Phase 6a-6d: Consolidate and clean up

6a: Delete dead standalone tollgate_core/ (12 files, never compiled)
6b: Rewrite dns_server.c as thin shim to component's tollgate_core_dns
    - Fix component DNS to bind to AP IP instead of INADDR_ANY
6c: Rewrite stratum_proxy.c as thin shim with struct cast to component types
6d: Move sandbox logic into component's tollgate_core_firewall
    - Add tollgate_core_fw_set_sandbox_ports/set_sandbox_mint_access
    - Add is_sandbox_allowed() to component's ip4_canforward_filter
    - Clean main/firewall.c to delegate filter to component
    - Remove redundant DNS auth double-calls from main firewall
Add ROADMAP.md with full extraction plan and checklists

All 21 unit tests pass. ESP-IDF build passes.

1 files changed, 0 insertions, 34 deletions

diff --git a/tollgate_core/src/tollgate_mining.h b/tollgate_core/src/tollgate_mining.h
deleted file mode 100644
index 39681a5..0000000
--- a/tollgate_core/src/tollgate_mining.h
+++ /dev/null
@@ -1,34 +0,0 @@
-#ifndef TOLLGATE_CORE_MINING_H
-#define TOLLGATE_CORE_MINING_H
-
-#include <stdint.h>
-#include <stdbool.h>
-
-#define TG_MINING_SHARE_WINDOW_S 30
-#define TG_MINING_BLOCK_SUBSIDY_SATS 312500000ULL
-#define TG_MINING_BLOCKS_PER_DAY 144ULL
-#define TG_MINING_MAX_CLIENTS 10
-
-typedef struct {
-    uint32_t ip;
-    uint64_t shares_accepted;
-    uint64_t shares_rejected;
-    int64_t first_share_time_ms;
-    int64_t last_share_time_ms;
-    double hashrate_ghs;
-} tg_mining_client_stats_t;
-
-uint64_t tg_mining_nbits_to_difficulty(uint32_t nbits);
-double tg_mining_calculate_hashprice(uint32_t nbits);
-double tg_mining_calculate_hashprice_override(uint64_t sats_per_ghs_day);
-int tg_mining_validate_share(const uint8_t *header80, uint32_t nonce, const uint8_t *target, int target_len);
-uint64_t tg_mining_shares_to_allotment_ms(double hashrate_ghs, double hashprice, int price, int step_ms);
-uint64_t tg_mining_shares_to_allotment_bytes(double hashrate_ghs, double hashprice, int price, int step_bytes);
-tg_mining_client_stats_t *tg_mining_get_or_create_client(uint32_t client_ip);
-void tg_mining_update_hashrate(uint32_t client_ip, bool accepted);
-const tg_mining_client_stats_t *tg_mining_get_client_stats(uint32_t client_ip);
-double tg_mining_get_current_hashprice(void);
-void tg_mining_set_current_nbits(uint32_t nbits);
-void tg_mining_init(void);
-
-#endif